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[IO9] Spacetime invisibility cloaks can hide entire events inside temporal voids - Page 7

post #61 of 139
Quote:
Originally Posted by Track View Post
No, I understand.

But that's in a laboratory, not capable of being administrated in every-day life.

But I wonder.. that's pretty close.

38 MPH = 55 Feet per second.

If they can bring that down to 5, and actually use it in an open-world environment..
That's why we don't have invisibility cloaks yet...
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post #62 of 139
Quote:
Originally Posted by B!0HaZard View Post
That's why we don't have invisibility cloaks yet...
We do for cars
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post #63 of 139
Quote:
Originally Posted by killeraxemannic View Post
Im guessing your a physic's major or something similar? I understand what you are saying somewhat but it goes a bit over my head.
No, I'm going to get a bachelor's (then hopefully continue on to masters) in aerospace engineering. But as an engineering you have to learn a lot of physics.

Here are the unofficial levels of physics which you learn:

Physics 1: High school level

Physics 2: Amount of physics necessary for medical school

Physics 3: Amount of physics necessary for Engineering

Physics 4: Physics majors.

What I've said rests in physics 2. Granted, this list is from my personal knowledge, is unofficial, and is a generalization. But its a good way to describe how much different people would learn depending on their majors.
    
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post #64 of 139
Quote:
Originally Posted by Track View Post
We do for cars
Or airplanes
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post #65 of 139
Quote:
Originally Posted by Singular1ty View Post
No, I'm going to get a bachelor's (then hopefully continue on to masters) in aerospace engineering. But as an engineering you have to learn a lot of physics.

Here are the unofficial levels of physics which you learn:

Physics 1: High school level

Physics 2: Amount of physics necessary for medical school

Physics 3: Amount of physics necessary for Engineering

Physics 4: Physics majors.

What I've said rests in physics 2. Granted, this list is from my personal knowledge, is unofficial, and is a generalization. But its a good way to describe how much different people would learn depending on their majors.
So you're saying that people who major IN Physics.. learn the most.. Physics.

Followed by Engineers, followed by doctors, followed by teenagers.

I certainly concur.

Btw, you don't actually learn too much Physics of you study Chemical Engineering.
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post #66 of 139
Quote:
Originally Posted by B!0HaZard View Post
Or airplanes
Or an Ostrich!

We could strap Obama to the back the Cheetah and he'd be invisible to the *Texan accent* Terr-arists!
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post #67 of 139
Quote:
Originally Posted by Benladesh View Post
I guess my physics professor (who is currently working on the LHC) was teaching us BS then...

The thing with this is that it really depends on who you're talking about, what is the situation relative to a certain person.

A person on a moving float bouncing a ball will see it bounce up and down, an observer beside the moving float will see it moving in "mmmm" motions.

The inertial frame of reference is basically how a certain thing can be observed relative to what you're doing (moving, being still .etc). What i said is an over simplification but it depends who the observer is.

The person in the ship will see time speed up on the outside, time goes normally for himself. The observer outside of the ship (lets assume at rest) will see time inside the ship slow down.

This is why it's called relativity, the situation changes depending on who the situation is relative too.
*Facepalm.

Either your professor's wrong, or your wrong, the two don't necessarily go hand in hand.

You were right up until you got to the point: "...The person in the ship will see time speed up on the outside..."

No he won't, he will see time slow down.

Let me flip this around, lets say that the guy on the ship is the proper observer for any arbitrary reason. He does not see himself in motion. He does not think he is moving. He sees that the world around him is in motion.

That said, lets say the guy on the ground is bouncing a ball as well (and really, this works so much better if your using a light clock for consistancy). The guy on the ground sees the ball going straight up, and straight down. The guy on the ship sees it following a VVVVV pattern since relative to him he is at rest and it is the guy on the ground who is moving.

Thus, the guy in the ship sees events outside of his ships going slower then events inside the ship.


You seem to think that there is a reason to prefer one inertial frame of reference to another. That is wrong.

Your closing statement is hypocritical, you say things will change depending on who's frame of reference were considering the proper frame of reference. Yet your example states the opposite.
Edited by Singular1ty - 4/13/11 at 1:27pm
    
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post #68 of 139
Quote:
Originally Posted by Track View Post
So you're saying that people who major IN Physics.. learn the most.. Physics.

Followed by Engineers, followed by doctors, followed by teenagers.

I certainly concur.

Btw, you don't actually learn too much Physics of you study Chemical Engineering.
That's somewhat surprising, I'd think you'd have to take a decent amount of quantum mechanics and such.
    
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post #69 of 139
Quote:
Originally Posted by Singular1ty View Post
That's somewhat surprising, I'd think you'd have to take a decent amount of quantum mechanics and such.
Quantum mechanics for a ChemE? What?
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post #70 of 139
Quote:
Originally Posted by Singular1ty View Post
Am I really the only one here who has something of a grasp of special relativity?

That was unexpected, I'd think there'd be at least a few electrical engineers in here.
I understand relativity failly well, and as I understand it, the twin moving closer to the speed of light will age slower than the twin on Earth, because the Earth is traveling much slower than the speed of light.

Twin paradox:
http://en.wikipedia.org/wiki/Twin_paradox
Quote:
If a pair of twins are born on the day the ship leaves, and one goes on the journey while the other stays on Earth, they will meet again when the traveler is 5.14 years old and the stay-at-home twin is 10.28 years old. The calculation illustrates the usage of the phenomenon of length contraction and the experimentally verified phenomenon of time dilation to describe and calculate consequences and predictions of Einstein's special theory of relativity.
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